import crypto from "node:crypto";
import path from "node:path";
import { password as promptPassword } from "@inquirer/prompts";
import { stringify } from "yaml";
import { hashPassword } from "../../lib/auth/password";
import { upsertEnvVar } from "../lib/env-file";
import { resolveConfigPath } from "../lib/paths";
import { slug } from "../lib/slug";

export interface UsersOptions {
  config?: string;
  inline?: boolean;
}

function printSnippet(heading: string, entry: Record<string, unknown>): void {
  console.log(`\n${heading}\n`);
  console.log(stringify([entry]));
}

async function promptNewPassword(): Promise<string> {
  for (;;) {
    const first = await promptPassword({ message: "Password", mask: true });
    const second = await promptPassword({
      message: "Confirm password",
      mask: true,
    });
    if (first === second) return first;
    console.error("Passwords did not match, try again.\n");
  }
}

export async function usersAddCommand(
  username: string,
  opts: UsersOptions,
): Promise<void> {
  const password = await promptNewPassword();
  const passwordHash = await hashPassword(password);

  if (opts.inline) {
    printSnippet("Add this under `auth.users:` in your config file:", {
      username,
      passwordHash,
    });
    return;
  }

  const configPath = resolveConfigPath(opts.config);
  const envPath = path.join(path.dirname(configPath), ".env");
  const varName = `TRIGGERSHELL_USER_${slug(username)}_PASSWORD_HASH`;
  upsertEnvVar(envPath, varName, passwordHash);

  console.log(`Stored ${varName} in ${envPath}`);
  printSnippet("Add this under `auth.users:` in your config file:", {
    username,
    passwordHash: `\${${varName}}`,
  });
}

export async function usersAddTokenCommand(
  name: string,
  opts: UsersOptions,
): Promise<void> {
  const token = crypto.randomBytes(32).toString("hex");
  const tokenHash = `sha256:${crypto.createHash("sha256").update(token).digest("hex")}`;

  console.log("\nSave this token now - it will not be shown again:");
  console.log(`  ${token}`);
  console.log(`Use it as: Authorization: Bearer ${token}`);

  if (opts.inline) {
    printSnippet("Add this under `auth.tokens:` in your config file:", {
      name,
      tokenHash,
    });
    return;
  }

  const configPath = resolveConfigPath(opts.config);
  const envPath = path.join(path.dirname(configPath), ".env");
  const varName = `TRIGGERSHELL_TOKEN_${slug(name)}_HASH`;
  upsertEnvVar(envPath, varName, tokenHash);

  console.log(`Stored ${varName} in ${envPath}`);
  printSnippet("Add this under `auth.tokens:` in your config file:", {
    name,
    tokenHash: `\${${varName}}`,
  });
}